Many third-party API's have rate limits to ensure you don't overuse or DoS them. Twitter for instance has the following rate limits:
- Unauthenticated calls are permitted 150 requests per hour. Unauthenticated calls are measured against the public-facing IP of the server or device making the request.
- OAuth calls are permitted 350 requests per hour and are measured against the oauth_token used in the request.
Using IronWorker's 'delay' parameter for Rate Limiting
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